On November 16, 2009 the government of the Philippines initiated a safeguard investigation on imports of Testliner board and notified it to the WTO with a document no. G/SG/N/6/PHL/8. The products subject to investigation are classified under the following HS code subheadings: 4805.24.00, 4805.25.00, 4805.25.10 and 4805.25.90.

On July 15, 2011 the final safeguard measure was imposed. In the first year of its implementation, the definitive general safeguard measure in the amount of P 1,342/MT shall be imposed. Following the measure shall be liberalised annually for the second and third year of the three-year implementation period to the extent of redressing or preventing the injury and to facilitate adjustment by the domestic industry from the adverse effects directly attributed to increased imports.On March 27, 2012 the safeguard duty on Testliner boards was reduced to:Philippine Pesos 1,342.00/MT in the first year of the implementation periodPhilippine Pesos 1,274.90/MT in the second year of the implementation periodPhilippine Pesos 1,211.15/MT in the third year of the implementation period

On 22 September 2016, the Philippines notified the WTO of the extension of the above definitive safeguard duty for a period of four years. The rate of duty is Php 986.50(USD 20.61) per tonne for the first year (12 June 2016 to 13 June 2017), Php 937.17 (USD 19.58) per tonne for the second year (14 June 2017 to 15 June 2018), Php 890.31 (USD 18.60) per tonne for the third year (16 June 2018 to 17 June 2019) and Php 845.80 (USD 17.67) per tonne for the fourth year (18 June 2019 to 20 June 2020). Certain developing countries are exempt from this safeguard duty.